Fully Control any PC Remotely – Freeware

TightVNC is a free remote control software package. With TightVNC, you can see the desktop of a remote machine and control it with your local mouse and keyboard, just like you would do it sitting in the front of that computer. Available for Linux and Windows. TightVNC is:

Free, GPL-licensed, with full source code available

Useful in remote administration, remote customer support, education, and for many other purposes

Cross-platform, available for Windows and Unix, compatible with other VNC software

TightVNC is freely available under the terms of the GNU General Public License (GPL).